Treatment		Amounts of nutrients applied annually (kg N, P, K or S ha⁻¹)
No	Amendments	N	P	K	S
1	Control (no amendment)	0	0	50	20
2	N only―100 kg N ha⁻¹ (using 34-0-0)	100	0	50	20
3	P only―20 kg P ha⁻¹ (using 0-45-0)	0	20	50	20
4	N + P―100 kg N ha⁻¹ + 20 kg P ha⁻¹	100	20	50	20
5	Penicillium bilaiae + 100 kg N ha⁻¹	100	0	50	20
6	Rock P granular (BC Mines) at 20 kg P ha⁻¹ + 100 kg N ha⁻¹	100	20	50	20
7	Rock P granular (BC Mines) at 20 kg P ha⁻¹ + 100 kg N ha⁻¹ + Penicillium bilaiae	100	20	50	20
8	Rock P finely-ground (BC Mines) at 20 kg P ha⁻¹ + 100 kg N ha⁻¹	100	20	50	20
9	Rock P finely-ground (BC Mines) at 20 kg P ha⁻¹ + 100 kg N ha⁻¹ + Penicillium bilaiae	100	20	50	20
10	Wood ash at 2 Mg∙ha⁻¹	0	10	140	46
11	Wood ash at 2 Mg∙ha⁻¹ + 100 kg N ha⁻¹	100	10	140	46
12	Wood ash at 2 Mg∙ha⁻¹ + 100 kg N ha⁻¹ + 20 kg P ha⁻¹	100	30	140	46
13	Alfalfa pellets at 3.5 Mg∙ha⁻¹	102	7	138	53
14	Compost at 8 Mg∙ha⁻¹	104	51	154	44
15	Thin stillage at 20,000 L∙ha⁻¹	100	22	82	30
16	Distiller grain (wheat)―dry at 2 Mg∙ha⁻¹	112	15	83	34
17	MykePro	0	0	50	20
18	MykePro + 100 kg N ha⁻¹	0	0	50	20
19	Bone meal at 154 kg∙ha⁻¹	0	20	50	20
20	Bone meal at 154 kg∙ha⁻¹ + 100 kg N ha⁻¹	100	20	50	20